A large mouth bass (Micropterus salmoides) alongside the Cessna Airplane in Dutch Springs lake. Largemouth bass is a freshwater gamefish in the sunfish family, and is the largest of the black basses. It reaches a maximum recorded overall length of 29.5 in (75 cm) and a maximum weight of 25 pounds (11 kg). The fish lives 16 years on average. Large mouth bass, native to North East America, have been introduced into many other countries due to its popularity as a sport fish. This causes the decline, displacement or extinctions of species in its new habitat, for example in Namibia.